Coulomb Drag in Double Layers with Correlated Disorder

Gornyi, I. V.; Yashenkin, A. G.; Khveshchenko, D. V.

doi:10.1103/physrevlett.83.152

Cited by 29 publications

(52 citation statements)

References 22 publications

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“…At the time of writing, no qualitative interference effect due to electron-electron interaction has been identified for drag measurements. At the technical level, the thirdorder drag effect (see the following Section) bears certain resemblance to the Altshuler-Aronov diagrams (Gornyi and Narozhny, 2014). Here we discuss the weak localization correction to Coulomb drag Kamenev and Oreg, 1995).…”

Section: Weak Localization Correctionsmentioning

confidence: 89%

“…Higher-order processes [including the so-called "thirdorder" drag (Levchenko and Kamenev, 2008b;Schütt et al, 2013), see Sec. II.D, and the effect of the corre-lated disorder (Gornyi et al, 2000(Gornyi et al, , 1999Schütt et al, 2013;Song et al, 2013), see Sec. IV.F] may result in additional contributions which are less sensitive to electronhole symmetry.…”

Section: Figmentioning

confidence: 99%

“…In the absence of interlayer disorder correlations [such effects were discussed in Gornyi et al (1999)], impurity scattering is confined to each individual layer. It should come as no surprise that the same mechanism behind the weak localization correction to single-layer conductivity (i.e., interference between time-reversed, self-intersecting paths) yields a correction to the nonlinear susceptibility.…”

Section: Weak Localization Correctionsmentioning

confidence: 99%

“…The theory of Coulomb drag between two 2DEGs was extended to dilute 2D hole systems (Hwang et al, 2003) and to the cases where one allows for certain tunneling processes between the layers (Oreg and Halperin, 1999;Oreg and Kamenev, 1998), interlayer disorder correlations (Gornyi et al, 1999;Hu, 2000a), in-plane potential modulation (Alkauskas et al, 2002), and disorder inhomogeneities (Apalkov and Raikh, 2005;Spivak and Kivelson, 2005;Zou et al, 2009Zou et al, , 2010. Theory of Coulomb drag between composite fermions was generalized to include phonon-mediated coupling (Bønsager et al, 2000;Khveshchenko, 2000).…”

Section: Frictional Dragmentioning

confidence: 99%

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Coulomb drag

2016

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Coulomb drag is a transport phenomenon whereby long-range Coulomb interaction between charge carriers in two closely spaced but electrically isolated conductors induces a voltage (or, in a closed circuit, a current) in one of the conductors when an electrical current is passed through the other. The magnitude of the effect depends on the exact nature of the charge carriers and microscopic, many-body structure of the electronic systems in the two conductors. Drag measurements have become part of the standard toolbox in condensed matter physics that can be used to study fundamental properties of diverse physical systems including semiconductor heterostructures, graphene, quantum wires, quantum dots, and optical cavities.

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Section: Weak Localization Correctionsmentioning

confidence: 89%

Section: Figmentioning

confidence: 99%

Section: Weak Localization Correctionsmentioning

confidence: 99%

Section: Frictional Dragmentioning

confidence: 99%

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Coulomb drag

2016

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“…͑6͒, which is the result of interchanging the natural order of the →0 limit and the weak scattering limit. A more sophisticated treatment of quantum effects in correlated impurity scattering 11 suggests that the spin drag would be even larger than predicted by the present theory at temperatures so low that k B TӶប/ D . The temperature range in which these quantum corrections are important shrinks to zero in the limit of weak impurity scattering.…”

Section: ͑18͒mentioning

confidence: 89%

Theory of spin Coulomb drag in spin-polarized transport

2000

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We introduce a distinctive feature of spin-polarized transport, the spin Coulomb drag: there is an intrinsic source of friction for spin currents due to the Coulomb interaction between spin ''up'' and spin ''down'' electrons. We calculate the associated ''spin trans-resistivity'' in a generalized random-phase approximation and show that, to the leading order in the interactions, it has no contribution from correlated impurity scattering. We show that, in an appropriate range of parameters, such resistivity is measurable, and we propose an experiment to measure it.Interest in spin-polarized transport has been growing dramatically in the past few years, spurred by the hope of realizing practical spin-electronic devices in a not too distant future. 1 In particular, it has been shown that spin coherence can be maintained over large distances ␦ s տ100 m and for long times T 2 ϳ10 Ϫ9 Ϫ10 Ϫ8 s both in metals 2 and in semiconductors. 3 In this paper we introduce a distinctive feature of spinpolarized transport: in a conductor, due to the Coulomb interaction, there is an intrinsic mechanism for friction between electrons of different spin, the ''spin Coulomb drag'' ͑SCD͒. For simplicity, we shall restrict our discussion to the case in which the spin state of each electron can be classified as ''up'' or ''down'' relative to the z axis. In the absence of impurities, the total momentum Pϭ ͚ i p i , where p i is the momentum of the ith electron, is a conserved quantity. On the contrary, the ''up'' and the ''down'' components of the total momentum, P ↑ ϭ ͚ i p i↑ (1ϩˆz i )/2 and P ↓ ϭ ͚ i p i↓ (1 Ϫˆz i )/2, where ˆz i is the the Pauli matrix for the z component of the ith electron's spin, are not separately conserved even in the absence of impurities: Coulomb scattering can transfer momentum between spin-up and spin-down electrons thereby effectively introducing a ''friction'' for relative motion of the two spin components. If, for example, one of the two spin components is set into motion relative to the other, it will tend to drag the latter in the same direction. Or, if a finite spin current is set up through the application of an external field, then the Coulomb interaction will tend to equalize the net momenta of the two spin components, causing the difference ͗P ↑ ͘Ϫ͗P ↓ ͘ to decay to zero when the external field is turned off.The most dramatic manifestation of the SCD is the appearance of a finite trans-resistivity defined as the ratio of the gradient of the spin-down electrochemical potential to the spin-up current density when the spin-down current is zero. This is completely analogous to the trans-resistivity measured in Coulomb drag experiments with electrons in two separate layers, 4-6 but in this case what makes the two electron populations distinguishable is not a physical separation but the different spin. In SCD, the nonconservation of the spin, caused mainly by the spin-orbit interaction, represents a ''leakage'' mechanism analogous to the interlayer tunneling in the usual Coulomb drag.First of all, let us de...

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Many-body Effects in Spin-polarized Transport

Vignale

Manipulating Quantum Coherence in Solid State Systems

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Coulomb Drag in Double Layers with Correlated Disorder

Cited by 29 publications

References 22 publications

Coulomb drag

Coulomb drag

Theory of spin Coulomb drag in spin-polarized transport

Many-body Effects in Spin-polarized Transport

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